How to Enable T-Mobile's wifi calling on the Samsung Galaxy S7 edge (unlocked version) SM-G935U

Ok, you have purchased the Samsung Galaxy S7 edge unlocked directly from Samsung to avoid being tied to any carrier and you are trying to enjoy all the features of the network including "wifi calling".

You tried to find the feature in the phone but it was nowhere to be found.

After many searches on Google,I found out how to enable this:

1. Go to the phone app
2. Click on the three little dots next to the search bar on the top left hand side of the screen to go to phone settings.
3. Click on settings.
4. Scroll down in the settings and click on wi-fi calling.
5. Select "Wi-Fi Preferred".

This should activate wi-fi calling in your phone!

For other interesting settings you can visit this support page at T-Mobile:

https://support.t-mobile.com/docs/DOC-28006#steps7